How to repair black onyx

The unique beauty of onyx makes it perfect for jewelry, furniture and sculpture. But black onyx is prone to damage if it is improperly laid or used. For example, heat, utensils or even overuse may result in a scratch or tear on onyx. To repair black onyx, you just follow some cleaning and polishing tips.
First , You should put a wet towel over the damaged black onyx, and then put a dab of countertop polish or rubbing compound on it. The compound should be slightly rough to the touch, for sake that it acts as a liquid sander.
Then You should then employ the buffing pad to polish the onyx with the compound. Never take too much pressure; the compound will do the work for you. Polish the onyx for about 30 seconds before wiping the compound away and checking the damaged area for progress. If the scratch is gone, progress to Step 3. If it's not, repeat the process as necessary. Keep in mind that chips will not buff out.
After step 2, you are supposed to wash the area with clean tap water and air dry it. Use a sponge or towel to spread paste wax over the polished area to reseal it. Put it alone for 12 hours to set.
After the above steps, you can learn how to repair the black onyx. Any beautiful jewelry will need your usual care and repair if you want it to be glistening and elegant for a longer time. Remember that you should always polish and maintain it for a short period of time.